JP6442933B2 - Steering device - Google Patents

Description

  The present invention relates to a steering device.

  2. Description of the Related Art Conventionally, some steering apparatuses have a tilt mechanism that can adjust a tilt position (height position) of a steering wheel provided on the steering column by swinging the steering column about a tilt central axis. .

  The tilt mechanism includes a vehicle body side bracket fixed to the vehicle body, a column side bracket that supports the steering column, and a support shaft that connects both brackets (see Patent Document 1). As shown in FIG. 10, a tilt elongated hole 102 is provided in both side plates of the vehicle body side bracket so as to have an arc shape extending in the tilt direction. It is movably inserted in the tilt direction. The tilt direction refers to the rotation direction around the tilt center axis.

  An operation lever and a lever-side cam that are inserted and fixed to the support shaft 105 are inserted into the support shaft 105 so as to be rotatable relative to the support shaft 105, and are engaged with the tilt elongated hole 102. A slide side cam 101 having the boss portion 104 is mounted.

  The boss 104 of the slide side cam 101 is slidably engaged (that is, inserted) with respect to the tilt elongated hole 102. Then, by the turning operation of the operation lever, the cam surface of the lever-side cam rides on the cam surface of the slide-side cam 101 and presses the slide-side cam 101 against the side portion of the body-side bracket so that the brackets are mutually connected. To be fixed to.

  Further, when the operation lever is rotated in the reverse direction while the brackets are fixed to each other, the pressing of the lever side cam against the slide side cam is released, and the column side bracket is moved in the tilt direction. The movement is allowed. In this state, when the steering column is moved to change to a desired tilt position, the boss 104 of the slide side cam 101 moves through the tilt long hole 102. The boss portion 104 of the slide side cam 101 has a non-circular cross section so that the boss portion 104 of the slide side cam 101 does not idle around the support shaft 105 when the tilt long hole 102 is moved. As shown in FIG. 10, there are various non-circular cross-sectional shapes of the boss portion 104, and for example, it has a rhombus shape. In FIG. 10, 103 is a telescopic long hole provided in the column side bracket, and the boss 104 is inserted so as to be movable in the telescopic direction.

JP 2009-255848 A

  By the way, in the steering device as described above, it is necessary to change the shape of the tilt oblong hole of the vehicle body side bracket every time the tilt central axis as a vehicle attachment point changes according to the type of vehicle on which the steering device is mounted. is there.

  This is because the arc locus of the boss portion changes as the distance from the tilt center axis to the boss portion changes when the type of vehicle changes. For this reason, when combining the cross-sectional shape of the boss part and the tilt long hole, considering the optimum shape of both, the boss part of the slide side cam should be newly set to match the arc shape of the tilt long hole Is preferred.

  Conventionally, it has been common to use these cams (lever side cam and slide side cam) among different vehicle types. However, when combining the shape of the tilt long hole and the shape of the boss portion of the slide side cam, the relationship between these combinations, for example, the rotational direction angle during tilting, or the gap between the inner surface of the tilt long hole and the boss portion, There is a problem that it cannot be set in the same way so that it does not matter.

  Further, if there is an oversight of the relationship of the combination at the design stage, there is a possibility that interference due to biting may occur or the tilt operation cannot be performed in the step of assembling the boss portion of the slide side cam into the tilt long hole. is there.

  The object of the present invention is not affected by the distance between the tilt center axis and the boss part, and does not require a design study for each specification of the vehicle type, and can share a cam regardless of the specifications. Another object of the present invention is to provide a steering device that does not have the concern of interference between the boss portion of the slide cam and the tilt long hole.

  In order to solve the above problems, a steering device according to the present invention includes a vehicle body side bracket fixed to a vehicle body, a column side bracket that supports a steering column, one of the vehicle body side bracket and the column side bracket. A support shaft that passes through an insertion hole provided in the other bracket of the vehicle body side bracket and the column side bracket, and is penetrated by the support shaft. A locking mechanism including a cam having a boss portion that is movably engaged with the tilt elongated hole in a direction in which the tilt elongated hole extends. A lock mechanism capable of fixing the tilt position of the steering column by causing the vehicle body side bracket and the column side bracket to approach each other by generating a pressing force In the steering apparatus provided, the boss portion of the cam is formed in a cylindrical shape, and the bracket provided with the tilt elongated hole is formed with a detent elongated hole parallel to the tilt elongated hole. The rotation preventing projection is formed to engage with the rotation preventing long hole so as to be movable in the extending direction of the rotation preventing long hole and prevent the cam from rotating around the support shaft. is there.

Further, it is preferable that a plurality of the anti-rotation long holes are formed, and the anti-rotation protrusions are respectively engaged with the anti-rotation long holes.
The insertion hole may be a telescopic long hole extending in the telescopic direction, and the boss portion may be inserted in the telescopic long hole so as to be movable in the telescopic direction.

  According to the present invention, it is not affected by the distance between the tilt center axis and the boss part, and it is not necessary to study the design for each specification of the vehicle type, and the cam can be shared regardless of the specifications. There is an effect that there is no fear of interference between the boss portion of the slide side cam and the tilt long hole.

Sectional drawing along the axial direction of the steering shaft in the steering device of 1st Embodiment. Sectional drawing orthogonal to the steering shaft axial direction of the upper side support mechanism in a steering apparatus (AA sectional drawing of FIG. 1). The side view along the axial direction of the steering shaft in a steering device. (a) is the perspective view which looked at the locking mechanism vicinity of a locked state from the lower side, (b) is a schematic diagram which shows the state by which a slide side cam is controlled to rotate within a tilt long hole and a telescopic long hole. (A) is a perspective view of a lever side cam, (b) is a right side view of the lever side cam, (c) is a front view of the lever side cam, and (d) is a left side view of the lever side cam. (A) is a perspective view of a slide side cam, (b) is a left side view of the slide side cam, (c) is a front view of the slide side cam, and (d) is a right side view of the slide side cam. The perspective view of the clamp of a vehicle body side bracket. The perspective view of a column side bracket. FIG. The schematic diagram which shows the state by which the conventional slide side cam is controlled to rotate within a tilt long hole and a telescopic long hole. Sectional drawing orthogonal to the steering shaft axial direction of the upper side support mechanism in the steering device of 2nd Embodiment. The perspective view of the clamp of a vehicle body side bracket. The perspective view of a column side bracket. The perspective view of a tilt bolt. The schematic diagram which shows the state by which rotation of a slide side cam is controlled within a tilt long hole.

(First embodiment)
Hereinafter, a first embodiment of a steering device according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the steering device 1 includes a steering shaft 2 and a steering column 4 that rotatably accommodates a column shaft 3 that constitutes a part of the steering shaft 2. A steering wheel 5 is connected to a rear end (right side in FIG. 1) of the column shaft 3 of the vehicle. On the other hand, an intermediate shaft (not shown) constituting a part of the steering shaft 2 is connected to a front end (left side in FIG. 1) of the column shaft 3 via a universal joint (not shown). Then, the steering angle of the steered wheels is changed by transmitting the rotation of the steering shaft 2 accompanying the steering operation to a steering mechanism such as a rack and pinion mechanism. The column shaft 3 is mounted on the vehicle in an inclined state so that the front side end portion is positioned on the lower side in the vertical direction of the vehicle.

  The steering device 1 is configured as a so-called column assist type electric power steering device (EPS) that rotationally drives the column shaft 3 using a motor as a drive source. Specifically, as shown in FIG. 1, the steering column 4 includes a column tube 11 and a steering force assisting device 12 that is fixed to the front end portion of the column tube 11. The steering force assisting device 12 includes a housing 13, a motor 14, a worm shaft (not shown) that is rotationally driven by the operation of the motor 14, and a worm wheel 15 that meshes with the worm shaft. A drive shaft 21 constituting a part of the column shaft 3 is connected to the worm wheel 15 so as to be integrally rotatable. The drive shaft 21 is rotatably supported via bearings 16a, 16b, and 16c provided in the housing 13.

  As a result, the rotation of the motor 14 is decelerated by the worm shaft and the worm wheel 15 (not shown) and transmitted to the drive shaft 21 to apply assist force to the steering system. The housing 13 is formed with a support portion 17 supported by a lower support mechanism 32 described later. A shaft hole 18 penetrating in the vehicle width direction is formed in the support portion 17.

  The steering device 1 also includes a tilt adjustment function for adjusting the tilt position of the steering wheel 5 and a telescopic adjustment function for adjusting the front-rear position. The column shaft 3 includes a lower shaft 23 that is integrally connected to the drive shaft 21 and a hollow upper shaft 22 that is spline-fitted to the lower shaft 23 so as to be movable in the axial direction. Yes. The steering wheel 5 is connected to the upper shaft 22.

  The column tube 11 includes an inner tube 26 whose front end is fixed to the housing 13 and accommodates the lower shaft 23, and an outer tube 25 that is externally fitted to the inner tube 26 so as to be movable in the axial direction. . The outer tube 25 supports the upper shaft 22 via a bearing 24. As shown in FIG. 1, an opening 27 extending in the axial direction and opening downward is formed in the side portion of the outer tube 25. As shown in FIGS. 1 and 2, an arc plate-like sheet member 28 is interposed between the outer tube 25 and the inner tube 26.

  As shown in FIG. 1, the front end side of the steering column 4 is supported by the housing 13 of the steering force assisting device 12 being connected by a lower support mechanism 32 provided in the vehicle front side portion of the vehicle main body 31. ing. Specifically, the lower support mechanism 32 includes a tilt center shaft 34 inserted through the shaft hole 18 of the support portion 17 of the housing 13, and the housing 13, that is, the steering column around the tilt center shaft 34. 4 is tiltably supported.

  Further, the steering column 4 is supported by connecting the column tube 11 to an upper support mechanism 33 provided in a portion of the vehicle main body 31 located behind the lower support mechanism 32. That is, the upper support mechanism 33 shown in FIGS. 1 and 2 supports the column tube 11 (outer tube 25) within a predetermined range so that the column tube 11 (outer tube 25) can tilt around the tilt center axis 34 and can move in the axial direction.

  Thus, the tilt position is adjusted by changing the position of the steering wheel 5 in the tilt direction, which is the rotation direction around the tilt center axis 34. Further, by moving the outer tube 25 and the upper shaft 22 with respect to the inner tube 26 and the lower shaft 23 and changing the position of the steering wheel 5 in the telescopic direction that is the axial direction of the steering shaft 2, the front and rear positions thereof are changed. Adjusted.

Next, the configuration of the upper support mechanism 33 will be described.
2 and 3, the upper support mechanism 33 includes a vehicle body side bracket 41 fixed to the vehicle body 31, a column side bracket 42 to which the steering column 4 (outer tube 25) is fixed, and both brackets 41. , 42 are connected to each other. The vehicle body side bracket 41 is fixed to the vehicle main body 31 by fastening bolts (not shown) inserted through fastening holes 48 formed in the plate 45.

  As shown in FIGS. 2 and 7, the vehicle body side bracket 41 includes a clamp 44 formed in a U shape when viewed from the axial direction of the steering shaft 2, and a flat plate 45 fixed to the upper end of the clamp 44. I have. The pair of side plates 46a and 46b of the clamp 44 are respectively formed with tilt long holes 47 extending in the tilt direction. Each tilt long hole 47 is formed in a long hole so that a boss portion 92 of the slide-side cam 66 and a cylindrical portion 57a of the collar 57, which will be described later, include an arcuate locus drawn with the tilt center shaft 34 as a swing center. ing.

  In addition, as shown in FIG. 7, in each side plate 46 a, 46 b of the clamp 44, a pair of anti-rotation long holes 49, 50 extend in the tilt direction at the portion sandwiching the tilt long hole 47, respectively. They are formed in parallel. The anti-rotation long holes 49 and 50 are formed such that each anti-rotation protrusion 96 of the slide-side cam 66 described later includes an arcuate locus drawn with the tilt center axis 34 as the center of oscillation.

  As shown in FIGS. 2 and 8, the column side bracket 42 is formed in a U shape when viewed from the axial direction of the steering shaft 2. As shown in FIG. 2, the upper ends of the side plates 51a and 51b are bent inward and fixed to the steering column 4 (outer tube 25) by welding or the like. As shown in FIG. 8, the pair of side plates 51a and 51b are formed with telescopic elongated holes 53 as insertion holes extending in the telescopic direction.

  As shown in FIG. 2, the support shaft 43 is formed in a shaft shape, and a head 54 having a larger diameter than other portions is formed at the base end (left end in FIG. 2). The support shaft 43 is inserted into the tilt long hole 47 and the telescopic long hole 53 in a state where the column side bracket 42 is disposed inside the vehicle body side bracket 41, and a nut 55 is screwed to the tip thereof. The vehicle body side bracket 41 and the column side bracket 42 are connected. As a result, the column side bracket 42 can be moved relative to the vehicle body side bracket 41 in the tilt direction within the range where the tilt long hole 47 is formed, and the telescopic direction within the range where the telescopic long hole 53 is formed. The relative movement is possible.

  As shown in FIG. 2, a collar 57 is inserted through the distal end side of the shaft portion 56 of the support shaft 43 so as to be rotatable and movable in the axial direction. The collar 57 includes a cylindrical portion 57a. The cylindrical portion 57a is tilted with respect to the tilt long hole 47 of the side plate 46b, and is telescopic with respect to the inside of the telescopic long hole 53 of the column side bracket 42. It is inserted freely. As shown in FIGS. 2 and 9, the collar 57 has a flange portion 58 projecting radially outward from the base end of the cylindrical portion 57 a, and a thrust is formed between the flange portion 58 and the nut 55. A bearing 59 is interposed. As shown in FIG. 9, a pair of anti-rotation protrusions 58a protrude from the flange portion 58 and are engaged (that is, inserted) into the pair of anti-rotation long holes 50 with a predetermined clearance. The predetermined clearance allows the pair of anti-rotation protrusions 58a to be engaged with the pair of anti-rotation long holes 50, respectively, and the axis L of the support shaft 43 of the collar 57 in each of the anti-rotation protrusions 58a. It is sized to prevent rotation around it. The collar 57, the flange portion 58, and the anti-rotation protrusion 58a are preferably made of, for example, sintered metal, but are not limited thereto.

  As shown in FIG. 2, the amount of protrusion of the anti-rotation protrusion 58a from the flange portion 58 is set to a length that does not reach the side plate 51b of the column side bracket 42 when the flange portion 58 is in contact with the side plate 46b of the clamp 44. Has been.

  As shown in FIGS. 2 to 4A, the upper support mechanism 33 is provided with a lock mechanism 61. The lock mechanism 61 generates a pressing force along the axial direction of the support shaft 43 and frictionally engages the vehicle body side bracket 41 and the column side bracket 42 with each other, whereby the position of the steering wheel 5 (tilt position and telescopic position). (Front-rear position)).

  Specifically, as shown in FIGS. 2, 3, and 4 (a), the lock mechanism 61 includes an operation lever 62 that is operated by a driver, and a connection plate that connects the operation lever 62 and the support shaft 43. 63. As shown in FIGS. 1 and 2, the lock mechanism 61 includes a pressing member 64 fixed to the central portion in the axial direction of the support shaft 43, a lever side cam 65 penetrating the support shaft 43, and a slide side as a cam. And a cam 66.

  As shown in FIG. 2, a square hole-like fitting hole 71 penetrating in the axial direction of the support shaft 43 is formed in the base end portion 62 a of the operation lever 62. A shaft portion 56 of the support shaft 43 is rotatably inserted into the fitting hole 71.

  As shown in FIGS. 2 and 3, the connection plate 63 has a connection hole 72 in which the head portion 54 of the support shaft 43 is fitted so as to be integrally rotatable, and an arc groove 73 whose center of curvature is the center of the connection hole 72. Is formed. The connection plate 63 is connected to the support shaft 43 by screwing the bolt 74 to the operation lever 62 via the arc groove 73 with the head 54 of the support shaft 43 fitted in the connection hole 72. The operation lever 62 is connected to rotate integrally.

  As shown in FIG. 3, the lock mechanism 61 is in a locked state in which the position of the steering wheel 5 is fixed when the operation lever 62 is in the locked position in the rotation range. Further, when the operation lever 62 is in the unlocked position in the rotation range, the unlocked state in which the position of the steering wheel 5 can be adjusted is set.

  In the present embodiment, when the operation lever 62 is in the unlock position, the gripping portion 62b is positioned below the position of the gripping portion 62b when the operation lever 62 is in the lock position, and the support shaft 43 From the vertical line (see FIG. 3) to the rear side of the vehicle longitudinal direction.

  In other words, the operation lever 62 is coupled to the support shaft 43 so that the rotation range is from a position below the support shaft 43 vertically to a position returned by a predetermined angle in the locking direction. In FIG. 3, the operation lever 62 in the locked position is indicated by a solid line, and a part of the operation lever 62 in the unlock position is indicated by a two-dot chain line.

  As shown in FIGS. 1 and 2, the pressing member 64 is formed in a cylindrical shape, and is connected to the support shaft 43 so as to be rotatable integrally with the outer periphery of the shaft portion 56 by serration fitting. The pressing member 64 is formed with a pressing portion 75 that protrudes upward in the vehicle vertical direction at the center in the axial direction. The pressing portion 75 is inserted into the opening 27 of the outer tube 25 and is in contact with the outer peripheral surface of the inner tube 26. And the press part 75 is formed in the fan shape. As shown in FIG. 2, the contact surface of the pressing portion 75 with the inner tube 26 is formed in an arc shape having a center of curvature at a position eccentric from the axis L of the support shaft 43.

  As shown in FIGS. 2, 4 (a) and 5 (a) to 5 (d), the lever side cam 65 is formed in a disc shape and faces the slide side cam 66. And an opposite surface 65 a opposite to the slide-side cam 66. Further, a square cylindrical boss portion 82 is formed at the center of the opposite surface 65a of the lever side cam 65.

  The lever-side cam 65 and the boss portion 82 are formed with a round hole-shaped through hole 81, and the shaft portion 56 of the support shaft 43 is rotatably inserted. The lever-side cam 65 is integrated with the operation lever 62 around the axis of the support shaft 43 by fitting the boss portion 82 into the fitting hole 71 of the operation lever 62 so as not to be relatively rotatable. Rotate.

  A plurality (four in this embodiment) of cam portions 83 are provided on the opposing surface 65 b of the lever side cam 65. The cam portion 83 is configured such that the protruding amount continuously changes along the circumferential direction of the lever side cam 65, and generates a pressing force in the axial direction of the support shaft 43 in cooperation with a slide side cam 66 described later. Let

  As shown in FIG. 5 (b), the cam portion 83 includes a cam surface 83a in which the amount of protrusion from the facing surface 65b increases at a constant rate toward the unlocking direction, and an end portion on the unlocking direction side of the cam surface 83a. And a flat surface 83b having a substantially constant protrusion amount. That is, the cam surface 83a is formed as an inclined surface. The cam portion 83 has an end surface 83c adjacent to the end of the flat surface 83b on the unlocking direction side.

  In addition, a step surface 65c that is recessed from the facing surface 65b to the side opposite to the slide-side cam 66 is formed on the radially outer side of the cam portion 83 on the facing surface 65b of the lever-side cam 65. A plurality of (four in this embodiment) stopper portions 84 that define the relative rotation range of the lever side cam 65 and the slide side cam 66 are formed on the step surface 65c.

  As shown in FIGS. 5 (a) and 5 (b), the stopper portion 84 includes an unlocking engagement surface 84a in which the protruding amount from the step surface 65c increases at a constant rate in the locking direction, and an unlocking side engagement. It has a flat surface 84b that is adjacent to the end portion on the lock direction side of the mating surface 84a and has a substantially constant protruding amount. That is, the unlocking side engaging surface 84a is formed as a slope. The stopper portion 84 is adjacent to the end portion of the flat surface 84b on the lock direction side, and the amount of protrusion of the portion on the lock direction side is sharply reduced, so that the stopper portion 84 is steeper than the unlock side engagement surface 84a. It has a lock side engagement surface 84c.

  As shown in FIGS. 2, 4 (a) and FIGS. 6 (a) to 6 (d), the slide-side cam 66 is formed in a disc shape and faces the lever-side cam 65. And an opposite surface 66a opposite to the lever side cam 65. A cylindrical boss 92 is formed at the center of the opposite surface 66 a of the slide cam 66. As shown in FIG. 4B, the boss portion 92 can be inserted into the long holes and slidably contacted with each other at the intersecting portion where the tilt long hole 47 and the telescopic long hole 53 intersect. Have Further, as shown in FIGS. 6A to 6D, a pair of anti-rotation projections 96 are provided on the opposite surface 66 a of the slide-side cam 66 so as to sandwich the boss 92. It protrudes in the same direction as the protruding direction. In addition, the separation distance from the boss | hub part 92 of each rotation prevention protrusion 96 may be the same, or may differ.

  In the present embodiment, as shown in FIG. 4B, the shaft centers O1 and O2 of the anti-rotation protrusions 96 and the shaft center L of the support shaft 43 are in the extending direction (telescopic direction) of the telescopic elongated hole 53. A slide-side cam 66 is attached to the side plate 46a so as to be included in the extending virtual plane H. Hereinafter, the posture in which the slide side cam 66 is attached to the side plate 46a is referred to as an attachment posture.

A round hole-like through hole 91 is formed in the slide side cam 66 and the boss portion 92, and the shaft portion 56 of the support shaft 43 is rotatably inserted.
For example, the lever side cam 65 and the slide side cam 66 are preferably made of sintered metal, but are not limited thereto.

  Each anti-rotation protrusion 96 is engaged (ie, inserted) with a predetermined clearance with each anti-rotation long hole 49 in the side plate 46a of the clamp 44. The predetermined clearance is such that the pair of anti-rotation projections 96 can be engaged (that is, inserted) into the pair of anti-rotation long holes 49, and the boss portions 92 of the anti-rotation projections 96 are provided. It is set to a size that prevents rotation around the support shaft 43.

The anti-rotation protrusion 96 is prevented from reaching the column-side bracket 42 because the amount of protrusion from the opposite surface 66a is less than the thickness of the side plate 46a.
Each detent projection 96 has a size that allows the boss portion 92 to move when the boss portion 92 moves in the tilted long hole 47 in the tilt direction, and is around the axis of the boss portion 92 (around the support shaft 43). When a rotational force is applied to the rotation stopper 49, the rotation stop hole 49 is engaged with the peripheral surface of the long hole 49 to prevent the rotation. The cross-sectional shape of the anti-rotation protrusion 96 is not limited, but is circular in this embodiment. As a result, when the rotational force around the support shaft 43 is applied to the slide side cam 66, the outer peripheral surface of the anti-rotation projection 96 is engaged with the inner peripheral surface of the anti-rotation long hole 49.

Thereby, the rotation of the slide side cam 66 around the support shaft 43 is restricted even when the boss portion 92 is inserted into the intersection of the tilt long hole 47 and the telescopic long hole 53.
A plurality of (four in the present embodiment) cam portions 93 are provided on a surface 66b of the slide side cam 66 facing the lever side cam 65. The cam portion 93 is configured such that the protruding amount continuously changes along the circumferential direction of the slide side cam 66, and generates a pressing force in the axial direction of the support shaft 43 in cooperation with the lever side cam 65. Let Specifically, as shown in FIG. 6B, the cam portion 93 includes a cam surface 93a in which the amount of protrusion from the facing surface 66b increases at a constant rate toward the locking direction, and the locking direction side of the cam surface 93a. And a flat surface 93b having a substantially constant protrusion amount. The cam portion 93 has an end surface 93c adjacent to the end portion in the lock direction of the flat surface 93b.

  In addition, a step surface 66 c that is recessed from the facing surface 66 b to the opposite side of the sliding cam 66 is formed on the radially outer side of the cam portion 93 on the facing surface 66 b of the sliding cam 66. A plurality of (four in this embodiment) stopper portions 94 that define the relative rotation range of the lever side cam 65 and the slide side cam 66 are formed on the step surface 66c. That is, the lever-side cam 65 and the slide-side cam 66 are formed so that the stopper portion 94 and the stopper portion 84 of the lever-side cam 65 face each other when mounted on the support shaft 43.

  As shown in FIGS. 6 (a) and 6 (b), the stopper portion 94 includes an unlock side engagement surface 94a in which the protruding amount from the step surface 66c increases at a constant rate in the unlock direction, and the unlock side. The engaging surface 94a has a flat surface 94b adjacent to the end portion on the unlocking direction side and having a substantially constant protruding amount. That is, the unlocking side engaging surface 94a is formed as a slope. Further, the stopper portion 94 is adjacent to the end portion of the flat surface 94b on the unlocking direction side, and the protrusion amount of the unlocking side portion is drastically reduced, so that the stopper portion 94 is steeper than the unlocking engagement surface 94a. It has a certain lock side engagement surface 94c.

  The unlock side engagement surface 94a is disposed so as to engage with the unlock side engagement surface 94a of the lever side cam 65 when the operation lever 62 is located at the unlock position. Further, the lock-side engagement surface 94c is arranged to engage with the lock-side engagement surface 84c of the lever-side cam 65 when the operation lever 62 is positioned at the lock position.

(Operation of the first embodiment)
Next, the operation of the steering device 1 configured as described above will be described.
(Rotation of the operating lever 62 to the locked position)
As shown in FIG. 3, when the operation lever 62 is turned from the unlock position to the lock direction and turned to the lock position, the lever-side cam 65 and the support shaft 43 are also turned in the same direction. By this rotation, the cam portion 83 (flat surface 83 b) of the lever side cam 65 rides on the cam portion 93 (flat surface 93 b) of the slide side cam 66 and moves the slide side cam 66 along the axial direction of the support shaft 43. And press toward the clamp 44 side. That is, the lever-side cam 65 and the slide-side cam 66 cooperate to generate a pressing force in the axial direction of the support shaft 43 against the elastic force of both the brackets 41, 42. Thereby, the side plates 46a and 51a and the side plates 46b and 51b of the vehicle body side bracket 41 and the column side bracket 42 are frictionally engaged with each other.

  The sliding cam 66 is given a rotational force toward the locking direction, that is, around the support shaft 43 via the cam portion 93 due to friction with the cam portion 83 of the lever side cam 65. The outer peripheral surface of the portion 96 is engaged with the inner peripheral surface of the anti-rotation long hole 49. As a result, the slide side cam 66 does not rotate around the support shaft 43 in the locking direction. Further, the collar 57 shown in FIG. 2 tries to rotate in the same direction due to the friction with the support shaft 43 due to the rotation of the support shaft 43 in the lock direction. The holes 50 are respectively engaged with the inner peripheral surface. For this reason, the collar 57 is prevented from rotating around the axis of the support shaft 43. Further, at this time, the lock side engagement surfaces 84c and 94c of the stopper portions 84 and 94 are engaged with each other, whereby the operation lever 62 is restricted from further rotating in the lock direction.

  Moreover, as shown in FIGS. 1 and 4, the pressing portion 75 of the pressing member 64 presses the inner tube 26 upward in the vehicle vertical direction, so that the outer peripheral surface of the inner tube 26 and the inner peripheral surface of the outer tube 25 are respectively The sheet member 28 is frictionally engaged.

  Thus, in the locked state of the lock mechanism 61, the position of the steering wheel 5 is moved by the frictional engagement force acting between the vehicle body side bracket 41 and the column side bracket 42 and between the inner tube 26 and the outer tube 25. Retained.

(Rotation of the operation lever 62 to the unlock position)
The operation lever 62 is rotated in the unlocking direction from the lock position shown in FIG. Then, the cam part 83 of the lever side cam 65 slides down from the cam part 93 of the slide side cam 66, and the axial pressing force disappears. Further, the side plates of both brackets 41 and 42 return to the state before the pressing force is applied by their own elastic force.

  At this time, a rotational force around the support shaft 43 is applied to the slide side cam 66 in the unlocking direction via the flat surface 93b in contact with the flat surface 83b of the lever side cam 65. Are respectively engaged with the inner peripheral surface of the anti-rotation long hole 49. As a result, the slide side cam 66 does not rotate around the support shaft 43 in the unlocking direction. Further, the collar 57 shown in FIG. 2 tries to rotate in the same direction due to friction with the support shaft 43 due to the rotation of the support shaft 43 in the unlocking direction. The long holes 50 are respectively engaged with the inner peripheral surface. For this reason, the collar 57 is prevented from rotating around the axis of the support shaft 43.

  As a result, the frictional engagement between the side plates 46a and 51a and the side plates 46b and 51b of the vehicle body side bracket 41 and the column side bracket 42 is released. After the release, when the driver releases his / her hand from the operation lever 62, the operation lever 62 is rotated in the unlocking direction by its own weight. First, the unlocking side engaging surfaces 84a and 94a of the stopper portions 84 and 94 rotate around each other. The operation lever 62 is located in the unlock position by engaging in the direction. Also, the pressing portion 75 of the pressing member 64 shown in FIGS. 1 and 2 does not press the inner tube 26 upward in the vehicle vertical direction, and the frictional engagement between the inner tube 26 and the outer tube 25 and the seat member 28 is released. The

  Thus, in the unlocked state of the lock mechanism 61, the frictional engagement between the vehicle body side bracket 41 and the column side bracket 42 is released, so that the tilt position (height position) of the steering wheel 5 is adjusted. It becomes possible.

  When the tilt position of the steering wheel 5 is adjusted, the column side bracket 42 (telescopic elongated hole 53) moves around the tilt center axis 34 in FIG. 1 according to the tilting of the steering column 4.

  The slide side cam 66 inserted through the telescopic elongated hole 53 following the movement of the column side bracket 42 tilts around the tilt center axis 34 within a range allowed by the telescopic elongated hole 53. That is, the slide side cam 66 moves through the tilt long hole 47 of the vehicle body side bracket 41 (clamp 44).

  When the slide-side cam 66 moves in the telescopic long hole 53 in the telescopic direction, friction with the inner surface of the tilt long hole 47 causes the boss portion 92 of the slide-side cam 66 shown in FIG. A rotational force is applied. However, the rotation of the slide cam 66 around the support shaft 43 is prevented by engaging the outer peripheral surface of each rotation preventing projection 96 with the inner peripheral surface of the rotation preventing long hole 49.

  At this time, similarly, when the collar 57 moves in the telescopic long hole 53 in the telescopic direction, the collar 57 is given a rotational force around the support shaft 43 by friction with the inner surface of the tilt long hole 47. However, the rotation of the collar 57 around the support shaft 43 is prevented by engaging the outer peripheral surface of each rotation preventing projection 58 a with the inner peripheral surface of the rotation preventing long hole 50.

Further, since the frictional engagement between the inner tube 26 and the outer tube 25 is released, the telescopic position of the steering wheel 5 can be adjusted.
This embodiment has the following features.

  (1) In the steering device 1 of the present embodiment, the boss portion 92 of the slide side cam 66 is formed in a cylindrical shape. Further, the vehicle body side bracket 41 provided with the tilt long hole is formed with a rotation preventing long hole 49 parallel to the tilt long hole 47. Further, the slide-side cam 66 is engaged with the rotation-preventing long hole 49 so as to be movable in the direction in which the rotation-preventing long hole extends so as to prevent the rotation of the slide-side cam 66 around the support shaft 43. A protrusion 96 is formed.

  With the above configuration, the slide side cam and the lever side cam can be easily shared regardless of the vehicle type. Further, unlike the prior art, the design of the boss portion of the slide cam is not required to be studied for each vehicle model.

  Conventionally, for example, as shown in FIG. 10, when the cross section of the boss portion of the slide cam is a non-circular shape such as a rhombus, the tilt elongated hole of the vehicle body side bracket is designed according to the shape of the boss portion. Consideration is necessary. According to this embodiment, it is not necessary to study the design.

  Further, the clearance between the inner surface of the tilt long hole 47 and the boss portion 92, the clearance between the inner surface of the anti-rotation long hole 49 and the anti-rotation projection 96, and the separation distance between the boss portion 92 and the anti-rotation projection 96 are determined for any vehicle type. There are the following advantages if they are unified. That is, the mounting posture of the slide side cam with respect to the vehicle body side bracket can be kept the same regardless of the specifications of the vehicle type. For example, in this embodiment, the mounting posture of the slide side cam with respect to the vehicle body side bracket is set as shown in FIG. 4B. However, if the clearance and the separation distance at this time are unified, In any vehicle type, the mounting posture shown in FIG. 4B can be achieved.

  Further, the rotation of the slide side cam around the support shaft is prevented by a rotation preventing long hole arranged in parallel to the tilt long hole with respect to the vehicle body side bracket and a rotation preventing projection provided on the slide side cam. Can do. That is, there is an effect that there is no fear of interference between the boss portion of the slide side cam and the tilt long hole.

  (2) In the steering device 1 of the present embodiment, two (plural) anti-rotation long holes are formed. Further, the plurality of detent projections 96 are engaged with the detent oblong holes 49, respectively. As a result, the rotation of the slide cam around the support shaft can be easily prevented.

  (3) In the present embodiment, the boss portion 92 of the slide cam 66 is inserted in the telescopic direction so as to be movable in the telescopic elongated hole as the insertion hole of the column side bracket 42 of the steering device 1. As a result, according to the present embodiment, the effect (1) can be easily realized not only for the tilt adjustment function but also for the steering device having the telescopic adjustment function.

(Second Embodiment)
Next, a steering apparatus according to a second embodiment will be described with reference to FIGS.
The steering device 1 of the present embodiment includes a tilt mechanism 6 that adjusts the tilt of the steering wheel 5, but differs from the first embodiment in that a telescopic adjustment function for adjusting the front-rear position is omitted.

In the present embodiment, the same or corresponding components as those of the steering apparatus of the first embodiment are denoted by the same reference numerals, and the description thereof will be simplified.
As shown in FIG. 11, the upper support mechanism 33 includes a steering column 4 that rotatably supports the steering shaft 2 and a tilt mechanism 6 that supports the steering column 4 with respect to a vehicle body (not shown). An intermediate shaft (not shown) and a pinion shaft (not shown) are connected to the steering shaft 2 via a universal joint (not shown), and rotation and steering torque based on the steering operation is applied to the steering wheel (not shown). It is transmitted to the steering mechanism that changes the rudder angle.

  The steering column 4 has an outer tube 25 and an inner tube 26, and the outer tube 25 and the inner tube 26 support the steering shaft 2 so as to be rotatable. The outer tube 25 includes an inner tube 26, and a plurality of portions are recessed, and the inner tube 26 is caulked and supported by the inner portion so that the inner tube 26 cannot rotate.

  The steering column 4 is supported to be tiltable about a tilt center axis (not shown) via a lower support mechanism (not shown) as in the first embodiment. The tilt mechanism 6 permits the steering column 4 to tilt with respect to the vehicle body and fixes the tilt position. The tilt mechanism 6 corresponds to a lock mechanism.

  The steering device 1 of this embodiment is a column-type electric power steering device that applies an assist force to a steering system by rotationally driving a steering shaft 2. As in the first embodiment, the steering apparatus 1 includes a motor (not shown), a reduction gear (worm shaft and worm wheel), which are driving sources thereof, and the like.

  The tilt mechanism 6 includes a plate 111 fixed to a vehicle body (not shown), a clamp 112 having a pair of side plates 112a and 112b facing each other and fixed to the plate 111, and brackets 110 and 115 to be described later. A shaft 118 is provided.

  Further, the tilt mechanism 6 includes a column side bracket 115 having a pair of side plates 115 a and 115 b disposed inside the side plates 112 a and 112 b of the clamp 112 and fixed to the steering column 4. In the present embodiment, the vehicle body side bracket 110 is configured by the plate 111 and the clamp 112. The column side bracket 115 is connected to the clamp 112 so as to be relatively displaceable by a support shaft 118 that passes through the side plates 115a and 115b and the side plates 112a and 112b of the clamp 112.

  As shown in FIGS. 11 and 12, the clamp 112 is formed in a substantially U-shaped cross section, and the side plates 112a and 112b bent from both ends of the base portion 112c are arranged so as to extend downward. 111 is fixed to the lower surface 111a.

  As shown in FIGS. 11 and 13, the column side bracket 115 is formed in a substantially U-shaped cross section like the clamp 112, and the front ends of the opposing side plates 112 a and 112 b are bent inward. The column side bracket 115 is fixed to the steering column 4 by welding the tips of the side plates 112a and 112b to the outer periphery of the steering column 4 (outer tube 25).

  As shown in FIGS. 11 and 13, the side plates 115 a and 115 b of the column side bracket 115 are formed with circular holes 116 facing each other. Each circular hole 116 shown in FIG. 13 has an inner diameter substantially equal to the diameter of the support shaft 118. In addition, as shown in FIG. 12, each side plate 112a, 112b of the clamp 112 is formed with a tilt long hole 112d corresponding to each circular hole 116. The support shaft 118 is inserted through each of the circular holes 116 and the tilted long hole 112d.

The tilt long hole 112d is formed in a long hole so that a boss portion 130 of the slide-side cam 120, which will be described later, includes an arcuate locus drawn with a tilt center axis (not shown) as a swing center.
In addition, as shown in FIG. 12, in each side plate 112a, 112b, a pair of anti-rotation long holes 113, 114 extend in the tilt direction and are formed in parallel with the tilt long hole 47 at the portion sandwiching the tilt long hole 112d. Has been. As in the first embodiment, the rotation preventing long holes 113 and 114 are configured so that the rotation preventing projection 132 of the slide cam 120 and the rotation preventing projection 121 of the support shaft 118, which will be described later, are centered on the tilt center axis (not shown). It is formed so as to include a drawn arc-shaped locus.

  As shown in FIGS. 11 and 14, the head portion 119 of the support shaft 118 is formed in a flange shape so as to contact the outer surface of the side plate 112b of the clamp 112, and movement to the column side bracket 115 side is restricted. Further, a base end portion of the support shaft 118 is formed with a cylindrical boss portion 118 b protruding in the axial direction of the support shaft 118. The boss portion 118b has the same width as the tilt long hole 112d, is fitted in the tilt long hole 112d, and is arranged to be slidable in the tilt long hole 112d in the tilt direction.

  As shown in FIG. 14, a pair of anti-rotation protrusions 121 project in the same direction as the boss portion 118b at a portion of the head 119 sandwiching the boss portion 118b. Each anti-rotation protrusion 121 is engaged (that is, inserted) so as to be movable in the tilt direction with respect to the pair of anti-rotation oblong holes 114 shown in FIG. ing.

  As the support shaft 118 moves in each tilt long hole 112d, the relative position of the column side bracket 115 with respect to the clamp 112 is changed in the direction in which the tilt long hole 112d is extended.

  As shown in FIG. 11, a slide cam 120, a lever cam 122, and an operation lever 124 are sequentially inserted into a portion of the support shaft 118 protruding from the tilt long hole 112 d of the side plate 112 a of the clamp 112. .

  The slide-side cam 120 is supported so that its through hole 126 can rotate with respect to the cylindrical shaft portion 122 a of the lever-side cam 122 and can move in the axial direction. The slide side cam 120 has a first cam surface 128 formed on the surface opposite to the side plate 112a.

  Further, in the slide side cam 120, a cylindrical boss portion 130 projects from the surface 120a of the clamp 112 on the side plate 112a side. The boss 130 is fitted into the tilt long hole 112d of the side plate 112a with the surface 120a of the slide cam 120 in contact with the outer surface of the side plate 112a of the clamp 112, and the inside of the tilt long hole 112d is tilted. Is slidably arranged.

  Further, in the slide-side cam 120, a pair of anti-rotation projections 132 project in the same direction as the projection direction of the boss 130 on the surface 120a of the clamp 112 on the side plate 112a side, as shown in FIG. In the present embodiment, as shown in FIG. 15, the shaft centers O3 and O4 of the rotation preventing projections 132 and the shaft center L1 of the support shaft 118 are set to be included in a common virtual plane H1.

  Further, each of the anti-rotation protrusions 132 engages (that is, is inserted) into the anti-rotation long hole 113, whereby the slide-side cam 120 rotates around the axis L1 of the support shaft 118 relative to the side plate 112a of the clamp 112. Is prevented from rotating.

  The lever side cam 122 is supported such that the through hole 134 is rotatable with respect to the shaft portion 118a of the support shaft 118 and is movable in the axial direction. The lever side cam 122 forms a second cam surface 136 on the surface on the slide side cam 120 side. Then, by rotating the lever side cam 122, the crest or trough of the second cam surface 136 comes into contact with the crest or trough of the first cam surface 128 of the slide cam 120. .

  The operation lever 124 is supported by fitting the through hole 138 so as not to rotate with respect to the cylindrical shaft portion 122b of the lever side cam 122 and to be movable in the axial direction. The cylindrical shaft portion 122a and the cylindrical shaft portion 122b are provided on the same axis and have the same inner diameter and the same outer diameter. Accordingly, the operation lever 124 rotates around the support shaft 118 as a center of rotation together with the lever side cam 122.

  As shown in FIGS. 11 and 14, the spindle 118 through which the slide cam 120, lever side cam 122, and operation lever 124 are inserted has a hooked nut 142 screwed onto a screw portion 140 formed at the tip thereof. ing.

  The hooked nut 142 is a screw of the support shaft 118 so that the slide side cam 120, the lever side cam 122, and the operation lever 124 are held at a predetermined interval between the hooked nut 142 and the side plate 112a of the clamp 112. Screwed to the portion 140. That is, the hooked nut 142 is configured so that the side plate 112a and the side plate 115a are slidably contacted with each other in a state where the peak portion of the second cam surface 136 is in contact with the valley portion of the first cam surface 128. It is screwed to 118 screw portions 140.

  A stopper plate 144 is connected between the hooked nut 142 and the base end portion of the operation lever 124. The stopper plate 144 has a crank shape, and a fitting hole 146 formed at the tip of the stopper plate 144 is fitted into the hooked nut 142, and is supported so as to be non-rotatable and movable in the axial direction with respect to the hooked nut 142. Yes. The stopper plate 144 has a base end portion fixed to the base end portion of the operation lever 124 with a fixing screw (not shown). Therefore, the stopper plate 144 is configured such that when the operation lever 124 is rotated, the hooked nut 142 fitted in the fitting hole 146 is rotated.

(Operation of Second Embodiment)
When the operation lever 124 is rotated from the state in which the side plate 112a and the side plate 115a are slidably in contact with each other, the lever side cam 122 rotates integrally with the rotation of the operation lever 124. Due to the rotation of the lever side cam 122, the peak portion of the second cam surface 136 rides on the peak portion from the valley portion of the first cam surface 128 of the slide side cam 120.

  At this time, the slide cam 120 tries to rotate around the support shaft 118 due to the cam action with the lever side cam 122. However, as shown in FIG. The holes 113 are engaged with each other. For this reason, the slide side cam 120 does not rotate around the axis L1 of the support shaft 118 with respect to the side plate 112a of the clamp 112.

  Further, each rotation prevention projection 121 of the support shaft 118 is engaged with the pair of rotation stop long holes 114 shown in FIG. 12 so that the support shaft 118 cannot rotate around its own axis. For this reason, the support shaft 118 also does not rotate.

  When the crests of the second cam surface 136 ride on the crests of the first cam surface 128 against the elastic force of the side plates of both brackets, the axis of the support shaft 118 that shrinks the side plates 112a and 112b of the clamp 112 inward. Power increases. Due to the increase of the axial force, the axial force is applied to the outer surfaces of the side plates 115a and 115b of the column side bracket 115 via the side plates 112a and 112b, respectively, and the friction of the friction engagement surface between the column side bracket 115 and the clamp 112 is increased. Resistance increases.

  As a result, the column side bracket 115 is fastened and fixed (clamped) to the clamp 112. In addition, since the lever side cam 122 moves in the tightening direction together with the hooked nut 142, the force for contracting the side plates 112a and 112b to the inside becomes larger, and the column side bracket 115 fixes and clamps the clamp 112 more firmly (clamp )

  When the column side bracket 115 is tightened and fixed (clamped), the column side bracket 115 becomes unable to swing, and the steering shaft 2 (steering wheel) is fixedly held at a predetermined inclination angle.

  When the operation lever 124 is rotated in the opposite direction to release the tightening and fixing state (unclamping) from the tightening and fixing state (clamping), the lever side cam 122 is moved along with the rotation of the operating lever 124. Rotates together. Due to the rotation of the lever side cam 122, the peak portion of the second cam surface 136 comes into contact with the valley portion from the peak portion of the first cam surface 128. When the peak portion of the second cam surface 136 contacts the valley portion of the first cam surface 128, the axial force of the support shaft 118 disappears, and the frictional resistance of the friction engagement surface between the column side bracket 115 and the clamp 112 disappears. To do. Further, the side plates of the bracket 115 and the clamp 112 return to the state before the pressing force is applied by their own elastic force.

  At this time, the slide cam 120 tries to rotate around the support shaft 118 due to the cam action with the lever side cam 122. However, as shown in FIG. The holes 113 are engaged with each other. For this reason, the slide side cam 120 does not rotate around the axis L1 of the support shaft 118 with respect to the side plate 112a of the clamp 112.

  Further, each rotation-preventing projection 121 of the support shaft 118 is engaged with a pair of rotation-preventing long holes 114 shown in FIG. 12 so that the support shaft 118 cannot rotate around its own axis (that is, inserted). Has been. For this reason, the support shaft 118 also does not rotate.

  When the frictional resistance of the frictional engagement surface disappears, the column side bracket 115 is released from the clamping and fixing (clamping) to the clamp 112, becomes unclamped and can swing. Accordingly, the outer side surfaces of the side plates 115a and 115b of the column side bracket 115 can slide with the inner side surfaces of the side plates 112a and 112b of the clamp 112, and the tilt angle can be adjusted by rotating the steering shaft 2. .

This embodiment has the following features.
(1) In the steering device 1 of the present embodiment, the boss portion 130 of the slide side cam 120 is formed in a cylindrical shape. Further, the vehicle body side bracket 110 is formed with a rotation preventing long hole 113 parallel to the tilt long hole 112d. Further, the slide-side cam 120 is formed with a rotation-preventing protrusion 132 that movably engages with the rotation-preventing long hole 113 and prevents the slide-side cam 120 from rotating around the support shaft 118 (support shaft). Has been. As a result, also in this embodiment, the same effect as (1) of the first embodiment is obtained.

In addition, embodiment of this invention is not limited to the said embodiment, You may change as follows.
In the first and second embodiments, the column side bracket is disposed inside the vehicle body side bracket. Instead of this, the vehicle body side bracket may be arranged inside the column side bracket. In this case, the lock mechanism is configured to press the slide side cam against the column side bracket.

  In the first and second embodiments, a tilt long hole and a rotation preventing long hole are formed in the vehicle body side bracket, and an insertion hole is formed in the column side bracket, but conversely, the tilt long hole and An insertion hole may be formed in the vehicle body side bracket.

  In the first and second embodiments, the vehicle body side bracket and the column side bracket are directly frictionally engaged to fix the tilt position of the steering column. However, the present invention is not limited to this configuration.

  For example, like a steering device described in Japanese Patent No. 3939806, a thin plate set formed by a thin plate which is a flat and smooth metal plate between a vehicle body side bracket and a column side bracket (see paragraphs 0009 and 0010 of the publication) And both brackets may be engaged via a thin plate set. In this case, the boss portion and the rotation preventing projection of the slide side cam are configured to penetrate the thin plate set and engage with the tilt long hole and the rotation preventing long hole of the bracket.

Further, the vehicle body side bracket and the column side bracket may be indirectly engaged by using means different from the thin plate set.
In the first and second embodiments, the two anti-rotation protrusions 96 and 132 are two, but may be three or more or a single. In this case, the number of the anti-rotation long holes 49 and 113 may be matched with the number of the anti-rotation protrusions 96 and 132.

  In the first embodiment, the anti-rotation long hole 50 is provided in the side plate 46b of the clamp 44 and the anti-rotation protrusion 58a is provided in the collar 57 so that the collar 57 does not rotate around the support shaft 43. The hole 50 and the anti-rotation protrusion 58a may be omitted.

  -In 2nd Embodiment, while providing the rotation prevention long hole 114 in the side plate 112b of the column side bracket 115 so that the support shaft 118 may not rotate around the shaft center of the support shaft 118, the rotation stop protrusion 121 is provided in the head 119. Provided. The anti-rotation long hole 114 and the anti-rotation protrusion 121 are omitted, the boss portion 118b has a non-circular cross section, and the support shaft 118 cannot be rotated around its axis with respect to the tilt long hole 112d. You may slidably fit in the direction.

  In the first embodiment, as shown in FIG. 4 (b), the slide side is set so that the axis O 1, O 2 of each detent projection 96 and the axis L of the support shaft 43 are included in the virtual plane H. Although the cam 66 is attached to the side plate 46a, it is not limited to this configuration.

  For example, a pair of virtual planes including the axis L of the support shaft 43 intersect at the coaxial center L, and one of the anti-rotation protrusions 96 is disposed so as to include the axis O1 in one of the virtual planes, and the other virtual plane The other anti-rotation protrusion 96 may be arranged so as to include the axis O2 in the plane.

  -Also in the second embodiment, a pair of detent projections intersects a pair of imaginary planes including the axis L1 of the support shaft 118 at the coaxial center L1, and one of the imaginary planes includes the axis O3. 132 may be arranged, and the other detent projection 132 may be arranged so as to include the axis O4 in the other virtual plane.

1 ... steering device, 2 ... steering shaft, 3 ... column shaft,
4 ... Steering column, 5 ... Steering wheel,
6 ... Tilt mechanism (lock mechanism), 11 ... Column tube,
25 ... Outer tube, 26 ... Inner tube, 31 ... Vehicle body,
32 ... Lower support mechanism, 33 ... Upper support mechanism, 34 ... Tilt center axis,
41 ... Body side bracket, 42 ... Column side bracket, 43 ... Spindle,
44 ... Clamp, 46a, 46b ... Side plate, 47 ... Tilt slot,
48 ... Fastening holes, 49, 50 ... Non-rotating oblong holes, 51a, 51b ... Side plates,
53 ... Telescopic elongated hole (insertion hole), 56 ... Shaft, 57 ... Collar, 58 ... Flange,
58a ... Anti-rotation protrusion, 59 ... Thrust bearing, 61 ... Lock mechanism,
62 ... Control lever, 65 ... Lever side cam,
66 ... slide side cam, 92 ... boss part, 96 ... detent protrusion,
110 ... Body side bracket, 112 ... Clamp, 112d ... Tilt oblong hole,
113 ... Non-rotating oblong hole, 114 ... Non-rotating oblong hole, 115 ... Column side bracket,
116: Round hole, 118: Support shaft, 120 ... Slide-side cam, 121 ... Anti-rotation protrusion,
122 ... Lever side cam, 124 ... Operating lever, 130 ... Boss part,
132: Anti-rotation projection, H, H1: Virtual plane, L, O1, O2, O3: Axis center.

Claims (4)

A vehicle body side bracket fixed to the vehicle body,
A column side bracket that supports the steering column;
Of the vehicle body side bracket and the column side bracket, an insertion hole provided in the other bracket of the vehicle body side bracket and the column side bracket passes through a tilt long hole provided in one bracket. A spindle penetrating through,
A lock mechanism including a cam that is pierced through the support shaft and movably engaged with the tilt elongated hole in a direction in which the tilt elongated hole extends. In a steering apparatus including a lock mechanism capable of fixing the tilt position of the steering column by causing the vehicle body side bracket and the column side bracket to approach each other by generating a pressing force in the axial direction of the support shaft,
The boss portion of the cam is formed in a cylindrical shape,
The bracket provided with the tilt elongated hole is formed with a detent elongated hole parallel to the tilt elongated hole,
The cam is formed with an anti-rotation protrusion that engages the anti-rotation oblong hole movably in a direction in which the anti-rotation oblong hole extends to prevent rotation of the cam around the support shaft. ,
Steering device. 2. The steering device according to claim 1, wherein a contour shape of a cross section obtained by cutting the rotation preventing protrusion along a direction orthogonal to the protruding direction is a circle . A plurality of the non-rotating oblong holes are formed,
The steering device according to claim 1 or 2 , wherein the anti-rotation protrusions are respectively engaged with the anti-rotation oblong holes. The insertion hole is a telescopic elongated hole extending in telescopic direction, the boss portion one one of the telescopic elongated claim which is movably inserted into the telescopic direction relative to the hole 1 to claim 3 The steering device according to item .